(US4956245-A)      The cooling plate consists of an inner substrate layer composed of a soft, deformable plastics or low elastic carbonaceous material, sandwiched between outer substrate layers of a strong gas-impermeable carbonaceous material, and a sealing material. The inner substrate is chased with grooves, which house metal cooling pipes for passage of the cooling medium. The soft, deformable, plastic or low elastic material of the inner substrate can be formed so that the grooves fit tightly around the cooling pipes, preventing formation of any air gaps between the pipes and the grooves.    This permits nearly complete circumferential contact between the pipes and the grooves, reducing thermal resistance associated with air gaps, and maintaining a high degree of heat transfer. The plastics or low elastic material of the inner substrate layer can conform to thermal expansion and contraction of the cooling plate and pipes, reducing excessive wear over the lifetime of the cooling plate.    USE -   Fuel cell cooling plate for eliminating waste heat generated by operation of a fuel cell. (6pp)e    (DE3903261-C)      The cooling panel (4) in the fuel cell has an inner substrate layer (41) which consists of two plane upper and lower plates essentially running parallel to each other and with opposing surfaces connected to each other and side surfaces (44) respectively positioned between the upper and lower outer surfaces (42). A number of parallel recesses is provided between the inner surfaces of the two plates (41).    A number of cylindrical hollow tubes (5) is accommodated in the recesses which at the periphery have close contact between the tubes and the walls of the recesses and are positioned to receive the cooling medium. A sealing medium is used to seal the inner substrate layer at the circumference of the recess (43) and prevents penetration of reactive gas in the inner substrate. An outer substrate layer (42) of a second material lies tightly against the upper and lower outer surfaces of the first substrate (41).    USE/ADVANTAGE -   Water cooling of stack type fuel cell. Smallest possible tolerances between recesses in cooling substrate. Small air gaps prevented between cooling tubes and body to give high measure of reliable heat transfer. Porous carbonaceous fibre material and binder which is deformable possessing either high plasticity or low eleasticity is used for inner substrate.